20524860225 has 27 divisors (see below), whose sum is σ = 36766154659. Its totient is φ = 10945446000.

The previous prime is 20524860217. The next prime is 20524860253. The reversal of 20524860225 is 52206842502.

The square root of 20524860225 is 143265.

It is a perfect power (a square), and thus also a powerful number.

20524860225 is a `hidden beast` number, since 2 + 0 + 5 + 2 + 48 + 602 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7388949681 + 13135910544 = 85959^2 + 114612^2 .

It is not a de Polignac number, because 20524860225 - 2³ = 20524860217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20524860225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2144200 + ... + 2153750.

Almost surely, 2^20524860225 is an apocalyptic number.

20524860225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20524860225 is the 143265-th square number.

20524860225 is the 71633-rd centered octagonal number.

It is an amenable number.

20524860225 is a deficient number, since it is larger than the sum of its proper divisors (16241294434).

20524860225 is an frugal number, since it uses more digits than its factorization.

20524860225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19118 (or 9559 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Multiplying 20524860225 by its sum of digits (36), we get a square (738894968100 = 859590²).

The spelling of 20524860225 in words is "twenty billion, five hundred twenty-four million, eight hundred sixty thousand, two hundred twenty-five".